com.google.gerrit.index.query.LimitPredicate Maven / Gradle / Ivy
// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.index.query;
import com.google.gerrit.common.Nullable;
public class LimitPredicate extends IntPredicate implements Matchable {
@SuppressWarnings("unchecked")
@Nullable
public static Integer getLimit(String fieldName, Predicate p) {
IntPredicate ip = QueryBuilder.find(p, IntPredicate.class, fieldName);
return ip != null ? ip.intValue() : null;
}
public LimitPredicate(String fieldName, int limit) throws QueryParseException {
super(fieldName, limit);
if (limit <= 0) {
throw new QueryParseException("limit must be positive: " + limit);
}
}
@Override
public boolean match(T object) {
return true;
}
@Override
public int getCost() {
return 0;
}
}